Iirc Palmers sells a double trigger guard! I would guess it would or could be made to fit. Other than that you could just get some flat stock and bend it to the shape you want and polish/finish it the way you want. On the latter option I would just make it where you could use the front frame screw to mount it. As far as the trigger guard rule I can't answer that for your area but most of the events/fields I go to do.